Very tricky! If you want Japanese clients, JLPT 3 wouldn't be good enough by a long long way. And then even if you had JLPT 1 level assistants you'd still face the big challenge of reaching the Japanese market. You could maybe service US/UK/AUS clients who need some sort of Japanese ability in their VA's NB You can book a Skype consultation about doing business in Japan with the founders -> https://publishizer.com/tokyo-cheapo/